A judge today refused to sign off on a $1.4 million settlement between the Tishman Construction Co. and nearly 750 sickened Ground Zero workers, saying he couldn’t vouch for “each and every term” in the deal.

Manhattan federal Judge Alvin Hellerstein called the agreement “fair and reasonable” overall, but objected to a provision saying it was “expressly contingent” on his approving it down to the last detail.

Hellerstein said he wouldn’t okay the accord “without a specific showing of the fairness and reasonableness of ‘each and every term contained’ in the settlement agreement.”

Tishman — which built the World Trade Center — was among six “ancillary” defendants that struck side deals after the the city settled with more than 10,000 responders last year.

Unlike the city’s offer — worth more than $662.5 million — the Tishman agreement would divvy up the proceeds equally among 742 plaintiffs, regardless of the severity of their injuries.